Circuit for eliminating shock noise of speed-adjustable fan

A fan noise technology, which is applied in the circuit field of eliminating the vibration noise of speed-adjusting fans, to reduce fan switching noise and reduce vibration

Inactive Publication Date: 2007-01-31
LENOVO (BEIJING) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is to overcome the defects of the existing pulse width modulation method, and provide a circuit for eliminating the vibration noise of the speed regulating fan, so as to eliminate the vibration of the fan casing caused by the pulse width modulation fan speed control technology and noise

Method used

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  • Circuit for eliminating shock noise of speed-adjustable fan
  • Circuit for eliminating shock noise of speed-adjustable fan
  • Circuit for eliminating shock noise of speed-adjustable fan

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Embodiment Construction

[0042] In the following, with reference to the accompanying drawings and preferred embodiments, a circuit for eliminating vibration and noise of a speed-regulating fan according to the present invention, its specific implementation, features and effects are described in detail below.

[0043] See image 3 As shown in the circuit diagram suitable for three-wire or two-wire fans, the present invention is a circuit for eliminating vibration and noise of a speed-regulating fan, which mainly includes: controlling to give a suitable current to the fan; controlling the increase rate of stator current; controlling the induction of the fan Three parts of the reverse voltage. It is mainly composed of standard triodes, diodes, resistors and capacitors. Among them: connect the collector of the transistor Q1 with the negative electrode of the controlled DC fan. In order to make the device work in the linear region as much as possible, the best device is to use a standard transistor. Connect a ...

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Abstract

A circuit eliminates shaking noise of speed regulation fan through adding standard triode control. The proper current is given to the fan, through adding RC circuit to control the increasing rate of stator current, through adding diode controlling the counter voltage of the fan induction, the problem of which conventional pulse width modulation fan control method can cause shaking and noise is solved, making the speed control technology of pulse width modulation fan to be used in the electronic system needing high requirement for silencing.

Description

Technical field [0001] The invention relates to a fan speed control technology in the field of electronic product mute design, in particular to a circuit for eliminating vibration noise of a speed-regulating fan. Background technique [0002] As the appearance of electronic products is becoming lighter, thinner and smaller, and functions are developing toward high performance and high power, how to solve the two contradictory quality indicators of heat dissipation and silence of electronic products has become one of the core technical problems that restrict the design of electronic products. Since electronic products generally do not always exert their maximum power during actual work, even for a large part of the time, the system only works at 50% of the maximum power or even lower, so fan speed control technology is used to reduce the noise of the system during actual work. To solve the contradiction between heat dissipation and mute has gradually become a popular solution. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/10
Inventor 陶宏芝林佑亮李恒杰
Owner LENOVO (BEIJING) LTD
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